.page-toc-button {
    background: rgba(0, 0, 0, 0.5);
    border-radius: 35px;
    display: block;
    position: fixed;
    top: 68px;
    right: 25px;
    width: 50px;
    height: 50px;
    text-decoration: none;
    -webkit-border-radius: 35px;
    -moz-border-radius: 35px;
}
.page-toc-button i {
    color: #fff;
    margin: 0;
    position: relative;
    left: 15px;
    top: 14px;
    font-size: 22px;
}
.page-toc-button .page-toc-menu {
    display: none;
    text-align: left;
}
.page-toc-button:hover {
    background: rgba(0, 0, 0, 0.9);
    border-radius: 0;
    cursor: pointer;	
    top: 68px;
    right: 25px;
    width: auto;
    height: auto;
    max-height: 70%;
    font-size: 14px;
    text-align: right;
    white-space: nowrap;
    -webkit-border-radius: 0;
    -moz-border-radius: 0;
    overflow-y: auto;
    overflow-x: hidden;
}
.page-toc-button:hover i {
    display: none;
}
.page-toc-button:hover .page-toc-menu {
    display: block;
}
.page-toc-menu li {
    color: #fff;
    padding-left: 5px;
    padding-right: 25px;
    padding-top: 5px;
    padding-bottom: 5px;
}
.page-toc-menu a {
    color: #fff;
}
.page-toc-menu a:hover {
    text-decoration: underline;
}
.book.color-theme-1 .page-toc-button {
    background: rgba(112, 66, 20, 0.5);
}
.book.color-theme-1 .page-toc-button i {
    color: #f3eacb;
}
.book.color-theme-1 .page-toc-button:hover {
    background: rgba(112, 66, 20, 0.9);
}
.book.color-theme-1 .page-toc-menu li {
    color: #f3eacb;
}
.book.color-theme-1 .page-toc-menu a {
    color: #f3eacb;
}
.book.color-theme-2 .page-toc-button {
    background: rgba(189, 202, 219, 0.5);
}
.book.color-theme-2 .page-toc-button i {
    color: #1C1F2B
}
.book.color-theme-2 .page-toc-button:hover {
    background: rgba(189, 202, 219, 0.9);
}
.book.color-theme-2 .page-toc-menu li {
    color: #fff;
}
.book.color-theme-2 .page-toc-menu a {
    color: #fff;
}

@media only screen 
  and (max-height: 240px) {
	.page-toc-button {
		display: none;
	}
}
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2) {
	.page-toc-button {
		display: none;
	}
}